Case study
Custom Countersunk Magnets for Wind Turbine Blade Pitch Systems
Sourcing N48SH countersunk magnets with epoxy coating for offshore wind turbine pitch sensor assemblies.
Key results
- Salt spray resistance increased to 500+ hours
- Dimensional consistency within ±0.03 mm across 5,000 pcs
- Delivery cycle reduced from 8 weeks to 4 weeks
Problem
A European wind turbine OEM needed countersunk NdFeB magnets for blade pitch position sensors on offshore installations. Their existing supplier delivered inconsistent coating quality — multiple batches failed salt spray testing after 200 hours, causing field failures in corrosive marine environments.
Solution
We sourced from a Ganzhou factory specializing in high-temperature grades with advanced coating lines. Key improvements:
- Switched from standard NiCuNi to epoxy over NiCuNi dual-layer coating
- Added 100% salt spray sampling (48hr accelerated test per batch)
- Implemented CMM dimensional verification on countersunk hole geometry
Specifications
- Material: NdFeB (N48SH)
- Shape: Disc with M4 countersunk hole
- Dimensions: Ø25 × 5 mm
- Tolerance: ±0.03 mm on OD, ±0.05 mm on countersunk depth
- Coating: NiCuNi + epoxy (dual layer)
- Operating temperature: -40°C to +150°C
- Volume: 5,000 pcs per quarter
Results
- Salt spray resistance exceeded 500 hours (vs. 200-hour failures before).
- Dimensional consistency within ±0.03 mm across full production run.
- Delivery cycle reduced from 8 weeks to 4 weeks using Ganzhou integrated supply chain.
Next Steps
Share your sensor housing drawings and environmental requirements to confirm grade and coating selection for your application.
Request a supplier quote
Share your drawings, grade targets, and quantities. We will coordinate supplier feedback and confirm specs.
Related products
Neodymium Disc Magnets
Source neodymium disc magnets with grade, coating, magnetization, tolerance, and compliance guidance plus RFQ support for OEM and industrial assemblies.
Industrial Magnets for Manufacturing, Lifting, and Separation
Source industrial magnets by load profile, operating environment, and assembly method with grade guidance, documentation support, and RFQ-ready specifications.
Related landing pages
Custom Neodymium Magnets for OEM RFQ
Custom neodymium magnets sourcing for OEM teams with drawing review, grade and coating checks, RFQ-ready checklist, and supplier coordination. Start your quote.
NdFeB Magnet Supplier Sourcing for OEM Buyers
Evaluate NdFeB magnet suppliers for OEM programs with RFQ checklists, compliance planning, and lead-time risk checks to reduce rework. Start your RFQ today.